Scan Tool Displays Undefined DTC. Chevrolet PJJ 2000

For 1990-2009 cars

### Circuit Description

The scan tool displays a DTC that is not defined in the service manual. The probable cause is an internal malfunction.

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the ABS Diagnostic System Check? | -- | Go to Step 2 | Go to ABS Diagnostic System Check
2 | Inspect the scan tool for the latest version of software. Did you find and correct the condition? | -- | Go to ABS Diagnostic System Check | Go to Step 3
3 | Inspect the scan tool to see if the correct vehicle parameters are selected. Did you find and correct the condition? | -- | Go to ABS Diagnostic System Check | Go to Step 4
4 | Replace the EBCM. Refer to Electronic Brake Control Module Replacement. Did you complete the replacement? | -- | Go to ABS Diagnostic System Check | --